CFR›Title 47›Chapter I›Part 64›Subpart BB ContainsSection 64.3100CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Subpart BB—Restrictions on Unwanted Mobile Service Commercial Messages Sections 64.3100 § 64.3100 Restrictions on mobile service commercial messages. Authority15 U.S.C. 7701-7713, Public Law 108-187, 117 Stat. 2699. Previous B Subpart B—Restrictions on Indecent Telephone Message Services Next I Subpart I—Allocation of Costs